The problem is that you tune by temp. You can't really tune by temp and be expected to have a perfect engine from one week to the next. 300F........you gotta be taking the piss mate. I (my pitman) can hold the head of my engine for a fair few seconds comfortably and not get burnt. Does it like a rich bottom.....ummm once you've got past the 1st gallon it really doesn't. Lots of punch for sure and gearing up to tame it can only be a good thing in my book. You'd get better run time that way. Has to run hot to get power, lies. I can easily keep up with the RB's, Nova's, Sirio's etc etc and it comes off a lot cooler than the C6 i used to use. This thing isn't going to over take down the straight but it hangs on. Pro's not running them stock... which pro runs a stock engine on any company???? If you wanted to run Speed internals i've been told that a fair bit of material has to be taken out of casing to do it so hardly worth the effort. The new Reedys the AE guys have (silver head) are mega powerful. Seriously as soon as this 'team' engine comes out i won't be hesitating to get one.